'use strict';
Object.defineProperty(exports, '__esModule', { value: true });
exports.pageScrollMixin = void 0;
function getCurrentPage() {
    var pages = getCurrentPages();
    return pages[pages.length - 1] || {};
}
function onPageScroll(event) {
    var _a = getCurrentPage().vanPageScroller,
        vanPageScroller = _a === void 0 ? [] : _a;
    vanPageScroller.forEach(function (scroller) {
        if (typeof scroller === 'function') {
            scroller(event);
        }
    });
}
exports.pageScrollMixin = function (scroller) {
    return Behavior({
        attached: function () {
            var page = getCurrentPage();
            if (Array.isArray(page.vanPageScroller)) {
                page.vanPageScroller.push(scroller.bind(this));
            } else {
                page.vanPageScroller =
          typeof page.onPageScroll === 'function'
              ? [page.onPageScroll.bind(page), scroller.bind(this)]
              : [scroller.bind(this)];
            }
            page.onPageScroll = onPageScroll;
        },
        detached: function () {
            var page = getCurrentPage();
            page.vanPageScroller = (page.vanPageScroller || []).filter(function (
                item
            ) {
                return item !== scroller;
            });
        },
    });
};
